double screw extruder has advanced design, high output, good plasticizing, lower energy consumption PVC pipe extruder SJZ-65/132 conical double screw extruder 1set Diameter of screw 65/132mmMaterial of cylinder and screw 38CrMoAl nitriding treatment manufacturing locationzhoushan hongfangTechinical parameter of screw depth of nitriding layer :0.5mmhardness:HV1000straightness<0.015mmEffective ...